Bosch Climate 7000i Notice D'installation page 72

Installation
3.5 Pipework connection
3.5.1 Connecting refrigerant lines to the indoor unit
WARNING
Risk of explosion and injury from presence of other gases or
substances.
The presence of other gases or substances will lower the unit's capacity,
and can cause abnormally high pressure in the refrigeration cycle.
▶ When connecting refrigerant piping, do not let substances or gases
other than the specified refrigerant enter the unit.
CAUTION
Discharge of refrigerant due to leaky connections
Refrigerant may be discharged if pipe connections are incorrectly
installed. Reusable mechanical connectors and flared joints are not
allowed indoors.
▶ Tighten flared connections only once.
▶ Always make new flared connections after loosening.
▶ Before the works are carried out, verify the correct refrigerant type.
The wrong refrigerant can lead to malfunction.
▶ Apart from the specified refrigerant, do not let air or other gases
enter the refrigeration circuit.
▶ If the refrigerant leaks during installation, make sure you fully
ventilate the room.
Copper pipes are available in metric and imperial sizes, the flare nut
thread is however the same. The flared fittings on the indoor and
outdoor unit are intended for imperial sizes.
▶ When using metric copper pipes, replace the flare nuts with nuts of a
suitable diameter ( Tab. 8).
▶ Determine pipe diameter and length ( Page 2.6.2).
▶ Cut the pipe to length using a pipe cutter ( Fig. 13).
▶ Deburr the inside of the pipe at both ends and tap to remove swarf.
External diameter of
pipe Ø [mm]
6.35 (1/4")
9.53 (3/8")
12.7 (1/2")
15.9 (5/8")
19 (3.4")
Table 8 Key data of pipe connections
3.5.2 Connecting refrigerant lines to the outdoor unit
▶ Unscrew the cover from the packed valve on the side of the outdoor
unit.
▶ Remove protective caps from ends of valves.
▶ Align the flared pipe end with each valve, and tighten the flare nut as
tightly as possible by hand.
▶ Using a spanner, grip the body of the valve.
Do not grip the nut that seals the service valve.
▶ While firmly gripping the body of the valve, use a torque wrench to
tighten the flare nut according to the correct torque values.
▶ Loosen the flaring nut slightly, then tighten again.
72
Tightening torque [Nm] Flared opening diameter
18-20
32-39
49-59
57-71
67-101
▶ Insert the nut onto the pipe.
▶ Widen the pipe using a flaring tool to the size indicated in the tab. 8.
It must be possible to slide the nut up to the edge but not beyond it.
▶ Connect the pipe and tighten the screw fitting to the torque specified
in the tab. 8.
▶ Use two wrenches when you install or dismantle the piping, a
common wrench and a torque wrench.
4
Fig. 2
[1] Normal wrench
[2] Torque wrench
[3] Pipe socket cap
[4] Pipe fittings
▶ Repeat the above steps for the second pipe.
NOTICE
Reduced efficiency due to heat transfer between refrigerant pipes
▶ Thermally insulate the refrigerant lines separately.
▶ Fit the insulation on the pipes and secure.
A minimum pipe run of 3 metres is required to minimise vibration &
excessive noise.
Flared pipe end
(A) [mm]
8.4-8.7
90°± 4
13.2-13.5
A
16.2-16.5
19.2-19.7
23.2-23.7
▶ Repeat the steps 3 to 6 for the remaining pipes.
3.5.3 Connecting condensate pipe to the indoor unit
The condensate drain of the indoor unit has two connections. A
condensate hose and bung are mounted on these connections at the
factory and can be replaced ( Fig. 14).
▶ Only route the condensate hose with a slope.
▶ Connect the drain hose, attaching the hose on the same side of the
piping to ensure proper drainage ( Fig. 12).
▶ Wrap the connection point firmly with Teflon tape to ensure a good
seal and to prevent leaks.
1
2
3
Pre-assembled flare nut
thread
3/8"
3/8"
5/8"
45°± 2
3/4"
R0.4~0.8
3/4"
Climate 7000i – 6721873506 (2024/12)
0010020833-002